Analyze the Community Internet Intensity Maps for the Northridge and Whittier Narrows eart...

Analyze the Community Internet Intensity Maps for the Northridge and Whittier Narrows earthquakes in Figure 5.19 and Checkpoint 5.16 and the Modified Mercalli scale in Table 5.2. Determine approximately how far from the epicenter ground shaking would have been strong enough to make it difficult for people to stand through both earthquakes.

Figure 5.19 Community Internet Intensity Map generated for the 1994 Northridge earthquake. A star marks the epicenter, and colored areas of the map indicate the earthquake intensity for each ZIP code area as reported by 8,401 responses to an online survey. The maximum measured intensity was IX, immediately adjacent to the epicenter.

Table 5.2 Modified Mercalli Scale for Earthquake Measurement